Submission #396669

#TimeUsernameProblemLanguageResultExecution timeMemory
396669SortingTraining (IOI07_training)C++17
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; const long long N = 2000 + 3; const long long M = 5000 + 3; long long n, m; vector<long long> adj[N]; vector<array<long long, 3>> e, e2; vector<long long> arr, dp; long long pos[N]; void dfs(long long u, long long p = -1){ arr.push_back(u); pos[u] = (long long)arr.size() - 1; for(long long to: adj[u]) if(to != p) dfs(to, u); } int main(){ ios::sync_with_stdio(false); cin.tie(NULL); cin >> n >> m; for(long long i = 0; i < m; ++i){ long long a, b, c; cin >> a >> b >> c; if(!c){ adj[a].push_back(b); adj[b].push_back(a); } else e.push_back({a, b, c}); } dfs(1); for(long long i = 0; i < e.size(); ++i){ auto [a, b, c] = e[i]; long long new_a = pos[a]; long long new_b = pos[b]; e[i] = {min(new_a, new_b), max(new_a, new_b), c}; } long long ans = 0; for(long long i = 0; i < e.size(); ++i){ auto [a, b, c] = e[i]; if((b - a) & 1) ans += c; else e2.push_back({a, b, c}); } sort(e2.begin(), e2.end()); for(auto [a, b, c]: e2) cout << a << " " << b << " " << c << endl; dp.resize(e2.size() + 1); dp[e2.size()] = 0; for(long long i = (long long)e2.size() - 1; i >= 0; --i){ long long next_idx = lower_bound(e2.begin(), e2.end(), array{e2[i][1] + 1, 0, 0}) - e2.begin(); next_idx = max(next_idx, i + 1); dp[i] = max(dp[i + 1], e2[i][2] + dp[next_idx]); } ans -= dp[0]; for(long long i = 0; i < e2.size(); ++i) ans += e2[i][2]; cout << ans << "\n"; } /* 3 3 1 3 1 1 2 0 2 3 0 */

Compilation message (stderr)

training.cpp: In function 'int main()':
training.cpp:41:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::array<long long int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     for(long long i = 0; i < e.size(); ++i){
      |                          ~~^~~~~~~~~~
training.cpp:49:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::array<long long int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for(long long i = 0; i < e.size(); ++i){
      |                          ~~^~~~~~~~~~
training.cpp:64:88: error: class template argument deduction failed:
   64 |         long long next_idx = lower_bound(e2.begin(), e2.end(), array{e2[i][1] + 1, 0, 0}) - e2.begin();
      |                                                                                        ^
training.cpp:64:88: error: no matching function for call to 'array(std::array<long long int, 3>::value_type, int, int)'
In file included from /usr/include/c++/9/tuple:39,
                 from /usr/include/c++/9/functional:54,
                 from /usr/include/c++/9/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/9/algorithm:71,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
                 from training.cpp:1:
/usr/include/c++/9/array:244:5: note: candidate: 'template<class _Tp, class ... _Up> std::array(_Tp, _Up ...)-> std::array<typename std::enable_if<(is_same_v<_Tp, _Up> && ...), _Tp>::type, (1 + sizeof... (_Up))>'
  244 |     array(_Tp, _Up...)
      |     ^~~~~
/usr/include/c++/9/array:244:5: note:   template argument deduction/substitution failed:
/usr/include/c++/9/array: In substitution of 'template<class _Tp, class ... _Up> std::array(_Tp, _Up ...)-> std::array<typename std::enable_if<(is_same_v<_Tp, _Up> && ...), _Tp>::type, (1 + sizeof... (_Up))> [with _Tp = long long int; _Up = {int, int}]':
training.cpp:64:88:   required from here
/usr/include/c++/9/array:244:5: error: no type named 'type' in 'struct std::enable_if<false, long long int>'
training.cpp:70:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::array<long long int, 3> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for(long long i = 0; i < e2.size(); ++i)
      |                          ~~^~~~~~~~~~~